导航条、状态条高亮状态改变

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    RootViewController*root=[[RootViewController alloc]init];
    UINavigationController*nav=[[UINavigationController alloc]initWithRootViewController:root];
    
    //[[UINavigationBar appearance]setTintColor:[UIColor redColor]];
    //ios 7以后使用BarTintColor 改变导航栏的背景颜色
    //  [[UINavigationBar appearance]setBarTintColor:[UIColor cyanColor]];
    
    [[UINavigationBar appearance] setBarTintColor:UIColorFromRGB(0x067AB5)];

    
    //设置图片
    //[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"u27.png"] forBarMetrics:UIBarMetricsDefault];
    //导航条上跳转之后的  返回字体的颜色
    [[UINavigationBar appearance] setTintColor:[UIColor redColor]];
    
 
    [[UINavigationBar appearance] setTranslucent:YES];
    
    self.window.rootViewController=nav;
    //状态条变成高亮的（白色）
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
    //状态条隐藏
    //  [UIApplication sharedApplication].statusBarHidden=YES;
    //导航条隐藏
    //  [self.navigationController setNavigationBarHidden:YES];
    [self.window makeKeyAndVisible];
    return YES;
}

//或者在info .plist中添加一个key   View controller-based status bar appearance并将它改成 NO;  ----设置成高亮状态
//在info .plist中添加一个key   Status bar is initially hidden 将他改为YES 就能隐藏状态栏（启动app以后的所有的状态栏）

#import "RootViewController.h"
#import "nextViewController.h"
#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
@interface RootViewController ()
{
    nextViewController*next;
}
@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    next=[[nextViewController alloc]init];
    UIButton*btn=[UIButton buttonWithType:UIButtonTypeCustom];
    btn.frame=CGRectMake(30, 30, 30, 30);
    btn.backgroundColor=[UIColor blackColor];
    [btn addTarget:self action:@selector(pressBtn) forControlEvents:UIControlEventTouchUpInside];
    [btn setImage:[UIImage imageNamed:@"u2.png"] forState:UIControlStateNormal];
   self.navigationItem.title=@"test";
  //  [self.navigationItem setTitle:@"ssss"];  都行
    //改变标题栏字体的大小和颜色
    //也可以创建一个label  把label 添加到导航条上，然后设置透明度
    [self.navigationController.navigationBar setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:19],NSForegroundColorAttributeName:[UIColor whiteColor]}];
    
    UIBarButtonItem*item=[[UIBarButtonItem alloc]initWithCustomView:btn];
    self.navigationItem.leftBarButtonItem=item;
    //导航条隐藏
  //  [self.navigationController setNavigationBarHidden:YES];
    //[[UINavigationBar appearance] setBarTintColor:[UIColor redColor]];
}
-(void)viewWillAppear:(BOOL)animated
{
    //不同界面的导航条颜色变化
   // self.navigationController.navigationBar.translucent=YES;
    self.navigationController.navigationBar.barTintColor = [UIColor greenColor];
}
-(void)pressBtn
{
    [self.navigationController pushViewController:next animated:YES];
}

#import "nextViewController.h"

@interface nextViewController ()

@end

@implementation nextViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
}
-(void)viewWillAppear:(BOOL)animated
{
    //不同界面的导航条颜色变化
   // self.navigationController.navigationBar.translucent=YES;
    self.navigationController.navigationBar.barTintColor = [UIColor cyanColor];
    
    
}